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Other or unknownPart report

2011 Mercedes-Benz C300 Other or unknown Problems

Complaints
33about this part
Share
7%of 480 total for the year
Median mileage
70,100miles
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

NHTSA recorded 33 complaints about the other or unknown of the 2011 Mercedes-Benz C300, 7% of the 480 complaints for this model year. Where a mileage was given, the median is 70,100 miles. 2 of these say a crash was involved, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“We are a small family owned car lot that has been in business since 2005. We sold a 2011 mercedes C300 to a nice young couple last week. After only having it less than 24 hours, the customer called stating the vehicle will not start. Said went to start the vehicle in the morning and the steering wheel was locked and car would not start. The lights & radio turned on but it had a message on dash to remove key from ignition. We had to call a tow company to tow it to the mechanic and put them in a loaner car. …”

NHTSA complaint #11046044, filed 2017-11, 90,000 miles

“If you search the internet you will see a lot of people are affected by this engineering flaw. There is a bearing in the transmission that fails and they are aware and will not replace it costing the consumer 1000s of dollars to repair. The bearing normally fails at 50000 to 90000 miles some fail sooner. Many have contacted the company and were treated poorly and basically the company does not care. We just had our replaced last week costing us 5200.00 please check the web you will find a lot of information. …”

NHTSA complaint #10907111, filed 2016-09, 50,000 miles

“I wasn't driving down the highway at 60 MPH and the car went into neutral by itself and stayed there in the middle of the road. The car wouldn't move at all and had to pull over to the hard shoulder and restart the engine. This happened to me 4 times in total. I scanned it and they said it's the speed sensor inside the conductor plate which entirely needs to be replaced and reprogrammed by mercedes. This is a safety issue because a car going into neutral in the middle of the highway is dangerous to other drivers which can cause an accident that can take your life. Many other cars with the 722. …”

NHTSA complaint #11118841, filed 2018-08, 70,100 miles

“I notice the driver's side front and rear of the vehicle was completely soaked with water after a night of heavy rain. I contacted the dealer and was advised by the service advisor this is a common problem with these vehicles. After the vehicle was at the dealership for a few days I was advised that there is a drain hose from the sunroof that is clogged and the repairs will not be covered under warranty. I infact went to the dealership the same day and was advised by the same service advisor that there was another vehicle that came in that same morning with the same issue!!! …”

NHTSA complaint #10761728, filed 2015-09, 72,000 miles

“Reporting a known mechanical failure to engine from apparent design of engine. 8/2017' vehicle had complete engine failure with <50000 miles, a replacement engine was installed at my expense, complaint filed with Mercedes-Benz and after internal review no compensation was granted to customer(myself) 1/2018-complete engine mechanical failure (2nd time). <6 month from replacement. Reported complaint to Mercedes-Benz. Company refuses to cover cost of an apparent mechanical 'recall' issue. …”

NHTSA complaint #11071528, filed 2018-02, 46,000 miles

Other or unknown: other model years

YearComplaintsShare of year
2024327%
2023418%
202228%
2020515%
20191014%
20182323%
20173617%
20166522%
20156317%
201489%
2013197%
2012239%
2011337%
2010276%
2009315%
2008386%

Other parts of the 2011 Mercedes-Benz C300

Air bags
250 complaints
Suspension
60 complaints
Body and structure
49 complaints
Fuel system
44 complaints
Electrical system
43 complaints
Steering
34 complaints
Exterior lighting
20 complaints
Brakes
13 complaints
Engine
10 complaints
Transmission and drivetrain
10 complaints
Seats
4 complaints
Vehicle speed control
3 complaints

← All problems reported for the 2011 Mercedes-Benz C300

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology